package com.cy.pj.sys.service.impl;

import com.cy.pj.common.entity.SysMenu;
import com.cy.pj.common.exception.ServiceException;
import com.cy.pj.common.vo.Node;
import com.cy.pj.sys.dao.SysMenuDao;
import com.cy.pj.sys.dao.SysRoleMenuDao;
import com.cy.pj.sys.dao.SysUserRoleDao;
import com.cy.pj.sys.entity.SysUserMenu;
import com.cy.pj.sys.service.SysMenuService;
import io.micrometer.core.instrument.util.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;

@Service
public class SysMenuServiceImpl implements SysMenuService {

    @Autowired
    private SysMenuDao sysMenuDao;
    @Autowired
    private SysRoleMenuDao sysRoleMenuDao;
    @Autowired
    private SysUserRoleDao sysUserRoleDao;

    @Override
    public List<Map<String, Object>> findObjects() {
        List<Map<String,Object>> list= sysMenuDao.findObjects();
        if(list==null || list.size()==0)
            throw new ServiceException("没有对应的菜单信息");
        return list;

    }

    //删除
    @Override
    public int deleteObject(Integer id) {
        //验证数据合法性
        if (id==null || id<=0)
            throw new IllegalArgumentException("请先选择");
        //2.基于id进行子元素查询
        int count=sysMenuDao.getChildCount(id);
        if(count>0)
            throw new ServiceException("请先删除子菜单");
        //3.删除角色,菜单关系数据
        sysRoleMenuDao.deleteObjectsByMenuId(id);
        //4.删除菜单元素
        int rows=sysMenuDao.deleteObject(id);
        if(rows==0)
            throw new ServiceException("此菜单可能已经不存在");
        //5.返回结果
        return rows;
    }

    //新增
    @Override
    public List<Node> findZtreeMenuNodes() {
        return sysMenuDao.findZtreeMenuNodes();
    }

    @Override
    public int saveObject(SysMenu entity) {
        //1.合法验证
        if(entity==null)
            throw new IllegalArgumentException("保存对象不能为空");
        if(StringUtils.isEmpty(entity.getName()))
            throw new IllegalArgumentException("菜单名不能为空");
        //2.保存数据
        int  rows=sysMenuDao.insertObject(entity);
        //3.返回数据
        return rows;
    }

    @Override
    public int updateObject(SysMenu entity) {
        //1.合法验证
        if(entity==null)
            throw new ServiceException("保存对象不能为空");
        if(StringUtils.isEmpty(entity.getName()))
            throw new ServiceException("菜单名不能为空");

        //2.更新数据
        int rows=sysMenuDao.updateObject(entity);
        if(rows==0)
            throw new ServiceException("记录可能已经不存在");
        //3.返回数据
        return rows;

    }

    @Override
    public List<SysUserMenu> findUserMenusByUserId(Integer userId) {
        //2.基于用户 id 查找用户对应的角色 id
        List<Integer> roleIds=
                sysUserRoleDao.findRoleIdsByUserId(userId);
        //3.基于角色 id 获取角色对应的菜单信息,并进行封装.
        List<Integer> menuIds=
                sysRoleMenuDao.findMenuIdsByRoleIds(roleIds);
        //4.基于菜单 id 获取用户对应的菜单信息并返回
        return sysMenuDao.findMenusByIds(menuIds);
    }

}